Generate a UUID v4

Generate a UUID v4 in modern JavaScript with the Web Crypto API.

const id = crypto.randomUUID();
console.log(id);

Generate a typed UUID v4 string in TypeScript.

const id: string = crypto.randomUUID();
console.log(id);

Generate a UUID v4 in Python with the standard library.

import uuid

identifier = uuid.uuid4()
print(identifier)

Generate a UUID v4 in Go with github.com/google/uuid.

package main

import (
  "fmt"
  "github.com/google/uuid"
)

func main() {
  id := uuid.New()
  fmt.Println(id)
}

Generate a UUID v4 in Java with java.util.UUID.

import java.util.UUID;

UUID id = UUID.randomUUID();
System.out.println(id);

Generate a UUID v4 in C# with Guid.NewGuid.

Guid id = Guid.NewGuid();
Console.WriteLine(id);

Generate a UUID v4 in PHP with ramsey/uuid.

use Ramsey\Uuid\Uuid;

$id = Uuid::uuid4();
echo $id->toString();

Generate a UUID v4 in Ruby with SecureRandom.

require "securerandom"

id = SecureRandom.uuid
puts id

Generate a UUID v4 in Rust with the uuid crate.

use uuid::Uuid;

fn main() {
    let id = Uuid::new_v4();
    println!("{id}");
}

Generate a UUID v4 in Kotlin with java.util.UUID.

import java.util.UUID

val id = UUID.randomUUID()
println(id)

Generate a UUID v4-style identifier in Swift with Foundation.

import Foundation

let id = UUID().uuidString
print(id)

Generate a random UUID in PostgreSQL with pgcrypto.

CREATE EXTENSION IF NOT EXISTS pgcrypto;

SELECT gen_random_uuid();